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MARKETABLE SECURITIES (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Oct. 31, 2015 | Oct. 31, 2014
Amortized cost and fair value of marketable securities |  |
Amortized Cost | $ 423.0 | $ 1,198.0
Gross Unrealized Gains | 17.0 | 22.0
Gross Unrealized Losses | 3.0 | 5.0
Fair Value | 437.4 | 1,215.1
Equity Fund |  |
Amortized cost and fair value of marketable securities |  |
Amortized Cost | 38.0 | 39.0
Gross Unrealized Gains | 5.0 | 6.0
Fair Value | 43.0 | 45.0
Fixed Income Funds |  |
Amortized cost and fair value of marketable securities |  |
Amortized Cost |  | 10.0
Fair Value |  | 10.0
U.S. Government Debt Securities |  |
Amortized cost and fair value of marketable securities |  |
Amortized Cost | 79.0 | 806.0
Gross Unrealized Gains | 3.0 | 3.0
Gross Unrealized Losses |  | 1.0
Fair Value | 82.0 | 808.0
Municipal Debt Securities |  |
Amortized cost and fair value of marketable securities |  |
Amortized Cost | 29.0 | 31.0
Gross Unrealized Gains | 2.0 | 3.0
Fair Value | 31.0 | 34.0
Corporate Debt Securities |  |
Amortized cost and fair value of marketable securities |  |
Amortized Cost | 121.0 | 167.0
Gross Unrealized Gains | 4.0 | 7.0
Gross Unrealized Losses | 1.0 | 2.0
Fair Value | 124.0 | 172.0
International Debt Securities |  |
Amortized cost and fair value of marketable securities |  |
Amortized Cost | 48.0 |
Gross Unrealized Losses | 1.0 |
Fair Value | 47.0 |
Mortgage-Backed Securities |  |
Amortized cost and fair value of marketable securities |  |
Amortized Cost | 108.0 | 145.0
Gross Unrealized Gains | 3.0 | 3.0
Gross Unrealized Losses | 1.0 | 2.0
Fair Value | $ 110.0 | $ 146.0

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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51813488&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26610-111562 + Details
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